Doorbell switch



May 5 1936. D. BROWN DOORBELL SWITCH Filed sept. 50, 1955 retenes Mey s,193e UNITED AsTl'iTEs PATENT oFFlcE Maasai Doorman. swrrcn David Brown,Chicago, Ill. sppueaaen september so, 1935, sei-n1 No. 4am

a 1 claim. (ci. zoo- 4) The invention relates to improvements in doorbells and has for its primary object the provision f an improved doorbell arrangement by l means of which one operating push button or thelike may be utilized for operating a plurality of door bells or thelike.

Other objects will appear hereinafter.

'I'he invention consists in the combinations and arrangements of partshereinafter described and claimed.

The invention will be best understood by reference to the accompanyingdrawing forming a i rt of this specification and in which Fig. 1 is aface view of a push button mounting adapted for use in an arrangementembodying the invention;

o 2-2 of Fig. 2.but also including a diametric view of the electriccircuits employed in the arrangement.

The embodiment of the invention illustrated v in the drawing comprises aplurality of door bells or buzzersl, 2, 2, 4, 2, 2, 1, 2, 2, I2, Il andi2, each of which will be located in one of the apartments or rooms of abuilding. Each of the bells or buzzers I-I2 is connected respectively awire, l2, I4, l2, I2, I1, I2, I9, 2li, 2|, 22, 22 and 24 with acorresponding electric contact 22, 22, 21, 22, 22, 22, 2|, 22, 22, 24,22 and 22 ar ranged circumferentially on a base Ablock 21 of insulatingmaterial.- 'I'he base block 21 is also provided with a central electriccontact 22, which in turn is connected by awire 22 with one side of asource of current such as a transformer battery or generator. The otherside of the source .of current is connected by means of a general Broundwire 42 and branch wires 4i with each of the electric bells or buzzersI-l2 as shown.

A suitable casing 42, which may be of metal, is arranged as indicated onthe base block 21 to enclose the contacts 22-22 and 22, and a pushbuttonl block 42, which may be preferably of insulating material, isrotatably mounted as indicated centrally on the outer face or top of`said casing. The block 42 is also provided with an indicator finger 44cooperating with a numbered dial on the outer face of the casing 42,asbest shown in Fig. l. A selective electric switch 42 is securedasshown to the inner side .of the block 42 inregistration with theindicator 44 and car ries at its outer end an electric `contact 42adapted and arranged to be shifted selectively into and out ofengagement with the various circumferential contacts 22422 as indicated.The springswitch 42 has its inner end extended to the'inner end of adepressible push button" mounted in the block 42, and the cxtreme endthereof is rebent to form a spring electric contact 42 adapted andarranged to make contact with the member 22 when the push button 41 isdepressed.

In use one of the electric bells or buzzers I-i2 is located in each roomor apartment of a building and the base block 21 with its associatedparts is positioned in the usual position of the door bells therefor,said electric bells or buzzers being connected in the electric circuitsas indicated in Fig. 3. By this arrangement, when desired the indicatorfinger 44 may be adjusted to registration with any one of the numbers onthe dial on the face of the easing 42, in which position the underlyingspring switch 42 will be in registration with the corresponding electriccontact 25-26, so that upon depression of the push button 41the-corresponding bell or buzzer will be operated. By adjusting theindicator iinger 44 to any one of the other numbers on the dial,

the corresponding bell or buzzer may be similarly operated, the singleopen button arrangement therefore serving to operate selectively thebells or buzzers for each of the rooms or apartments, as will be readilyunderstood.

The specific form and arrangement of parts constitute a simple andeffective Ione for the purpose.

While I have illustrated and described the preferred form ofconstruction for carrying the invention into eifect, this is capable ofvariation and modification without departing from the spirit of theinvention. I, therefore, do not wish to be limited to the precisedetails disclosed, but desire. to avail myself of such variations andmodiiications as fall within the scope of the appended claim.

I claim:

'A switch comprising a base member; a plurality of circumferentiallyarranged electric contacts thereon; a central contact on said basemember; a casing on said base member and enclosing said contacts; a pushbutton block rotatably mounted on said casing with its axis of DAVIDBROWN.

